function startTime()
{
var today=new Date();
var d = today.getDate();
var M = today.getMonth()+1;
var y = today.getYear();
if(y < 1900){
     y = y+1900;
}

var h=today.getHours();
var m=today.getMinutes();
var s=today.getSeconds();
// add a zero in front of numbers<10
M=checkTime(M);
d=checkTime(d);
m=checkTime(m);
s=checkTime(s);
document.getElementById('hora').innerHTML=d+"/"+M+"/"+y+" "+h+":"+m+":"+s;
t=setTimeout('startTime()',500);
}

function checkTime(i)
{
if (i<10)
  {
  i="0" + i;
  }
return i;
}